Square Root : If x^{2} = y, we say that the square root of y is x and we write, √y = x.
Thus, √4 = 2, √9 = 3,
√196 =14. Cube Root : The cube root of a given number x is the number whose cube is x. We denote
the cube root of x by ^{3}√x
Thus, ^{3}√8 = ^{3}√2x 2 x 2 = 2,
and ^{3}√343 =
^{3}√7 X 7 X 7 = 7 etc. Note :
1. √xy = √x X √y

2. √^{x}/_{y} =
^{√x}/_{√y} =
^{√x}/_{√y} X
^{√y}/_{√y} =
^{√xy}/_{y}